Bottom Line: anywhere from $95 to $140 for everything you'll need (TX tools) to do this ONE time (includes TX US shipping). Your other option is to send it to someone (I happen to be someone who does this) and it'll cost you $110 - $130 (US shipping both ways) to have it done right this first time. If you're not very good at soldering or have POS soldering tools (most hobbyists do) you WILL get frustrated and/or screw it up.

(P.S. If you're in the UK, obviously you wouldn't send it to me or anyone else in the U.S.)